Brachyhesma microxantha, or Brachyhesma (Microhesma) microxantha, is a species of bee in the family Colletidae and the subfamily Euryglossinae. It is endemic to Australia. It was described in 1914 by British-American entomologist Theodore Dru Alison Cockerell.
The species occurs in eastern Queensland. The type locality is Mackay.
The adults are flying mellivores. Flowering plants visited by the bees include Leptospermum species.